odbc 1.3.4

• Optimized table preview methods. Enhances large table preview
  within RStudio IDE (@detule, #525).

• Added attributes parameter to dbConnect(...). Can be used to pass a
  token and authenticate against Azure AD when using Microsoft SQL Server.
  Documented in ?ConnectionAttributes (@detule, #521).

• Fix length(x) = 3 > 1' in coercion to 'logical(1) warning in connection
  observer (@meztez, #494).

odbc 1.3.3

• Hadley Wickham is now the maintainer.

odbc 1.3.2

• New odbcDataType.Snowflake() method for Snowflake databases. (@edgararuiz, #451)

odbc 1.3.1

• Fixed warnings about anonymous unions (@detule, #440)
• Fixed invalid descriptor issues when retrieving results from SQL Server +
  Microsoft's ODBC driver, using parametrized queries. (@detule, #414)
• Fixed null handling in SQL Server / Azure result sets retrieved with
  Microsoft's ODBC driver. (@detule, #408)
• Hive uses C-style escaping for string literals (single quotes are
  backslash-escaped, note single quote-escaped). dbQuoteString now respects
  this when called on a connection of class Hive. (@rnorberg, #184)
• When calling sqlCreateTable(con, ..., temporary = TRUE) and con is a
  connection of class DB2/AIX64, the CREATE TABLE statement that is generated
  properly creates a temporary table in DB2. The statement begins with
  DECLARE GLOBAL TEMPORARY TABLE
  and ends with ON COMMIT PRESERVE ROWS (DB2's default behavior is
  ON COMMIT DELETE ROWS, which results in the inserted data being
  deleted as soon as dbWriteTable completes). (@rnorberg, #426)

odbc 1.3.0

Major changes

• odbc can now be compiled again with Rtools35 (gcc 4.9.3) on Windows (#383)
• invalid descriptor errors from drivers such as Microsoft SQLServer driver and the freeTDS driver which do not support out of order retrieval are now avoided.
  This is done by unbinding any nanodbc buffer past the long column.
  Performance for the unbound columns in these cases will be reduced, but the retrieval will work without error (@detule, #381)
• dbBind() and dbFetch() now support multiple result sets (@vkapartzianis, #234)

Minor improvements and fixes

• New dbAppendTable() method for OdbcConnection objects (#335)
• dbQuoteIdentifier() now uses the input names (if any).
• dbWriteTable() and dbBind() now default to a batch_rows of NA, which sets the batch size to be the length of the input.
  This avoids problems with drivers that don't support batch sizes larger than the input size.
  To restore the behavior prior to this release pass batch_rows = 1024 or set options(odbc.batch_rows = 1024) (#391).
• dbWriteTable() now handles data.table::IDate() objects (#388)
• dbWriteTable(field.types=) now issues a warning rather than an error for missing columns (#342)
• odbcConnectionColumns() now works as intended with DBI::Id() objects (#389)
• dbFetch() now verifies that n is a valid input.
• Dates are now always interpreted as being in the database's local time zone, regardless of the timezone parameter (#398)
• Oracle connections now support Date and POSIXct types via DATE and TIMESTAMP data types (#324, #349, #350)
• Oracle connections now use VARCHAR2 rather than VARCHAR, as recommended by Oracle's documentation (#189)

odbc v1.2.3

• dbWriteTable() now executes immediately, which fixes issues with temporary tables and the FreeTDS SQL Server driver (@krlmlr).

• blob roundtrips now work in more cases (#364, @krlmlr).

• The BH dependency has been removed (#326)

odbc 1.2.2

• The configure script now again uses iodbc-config on macOS, if available.

• Fix errors with drivers who do not fully implement SQLGetInfo (#325).

odbc 1.2.1

• Fix the unicode character width issues with the macOS odbc CRAN binary. (#283)

• The configure script now works on systems whose /bin/sh does not support
  command substitution, such as Solaris 10.

odbc 1.2.0

Features

• sqlCreateTable() and dbWriteTable() now throw an error if you mistakenly
  include field.types names which do not exist in the input data. (#271)

• The error message when trying to write tables with unsupported types now
  includes the column name (#238).

• dbConnect() now has a new param timezone_out which is useful if the user
  wants the datetime values be marked with a specific timezone instead of UTC
  (@shrektan, #294).

• dbGetQuery(), dbSendQuery() and dbSendStatement() gain a immediate
  argument to execute the statement or query immediately instead of preparing,
  then executing the statement. (#272, @krlmlr)

• dbGetQuery(), dbSendQuery() and dbSendStatement() gain a params
  argument, which allows them to be used (indirectly) by DBI::dbAppendTable()
  (#210, #215, #261).

• dbWriteTable() and dbBind() methods gain a batch_rows argument, to
  control how many rows are bound in each batch. The default can be set
  globally with options(odbc.batch_rows). This is useful if your database
  performs better with a larger or smaller number of rows per batch than the
  default of 1024. (#297)

• New odbcConnectionColumns() function to describe the column types. This
  data is used when binding columns, which allows drivers which do not support
  the SQLDescribeParam() ODBC function, such as freeTDS to work better with
  bound columns. (#313, @detule)

• Added a Teradata odbcDataType() to support writing logical data to Teradata
  servers (#240, @blarj09).

• Added a Access odbcDataType() method to support writing to Access databases
  (#262, @vh-d)

• odbcListDrivers() gains a keep and filter argument and global options
  odbc.drivers_keep, odbc.drivers_filter to keep and filter the drivers
  returned. This is useful if system administrators want to reduce the number
  of drivers shown to users. (@blairj09, #274)

• Subseconds are now retained when inserting POSIXct objects (#130, #208)

• The RStudio Connections Pane now shows the DSN, when available (#304,
  @davidchall).

Bugfixes

• SQL Server ODBC's now supports the '-155' data type, and its losing
  sub-second precision on timestamps; this still returns type DATETIMEOFFSET
  as a character, but it preserves sub-seconds and has a numeric timezone
  offset (@r2evans, #207).

• dbExistsTable() now handles the case-sensitivity consistently as
  other methods (@shrektan, #285).

• dbExistsTable() now works for SQL Server when specifying schemas but not
  catalogs using the freeTDS and Simba drivers. (#197)

• DBI::dbListFields() no longer fails when used with a
  a qualified Id object (using both schema and table) (#226).

• dbWriteTable() now always writes NA_character as NULL for
  data.frame with only one row (@shrektan, #288).

• Fix an issue that the date value fetched from the database may be one
  day before its real value (@shrektan, #295).

odbc v1.1.2

• Fix the return value for dbQuoteIdentifier() when given a length 0 input
  (#146 @edgararuiz).